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        • 平凹透鏡
         
        平凹透鏡

         

        Plano-concave Lenses present a concave surface and a plano surface. They have a negative focal length and are used for image reductinon or to spread light. These lenses diverge collimated incident light and form virtual images which are seen through the lens. They are often used to expand light or to increase focal lengths in existing systems.

        Specifications:
        Material:----------------------------------------------N-BK7, Fused Silica, N-SF10, Silicon, Ge,CaF2, etc.
        Diameter Tolerance:----------------------------+0.0/-0.15mm
        Focal Length Tolerance (mm):---------------+/-2%
        Centration:-----------------------------------------<3 arc minutes
        Clear Aperture:------------------------------------>85%
        Surface Figure (per 25mm@632.8nm)----<1.5λ
        IRR ( @632.8nm)---------------------------------<λ/4
        Surface Quality:------------------------------------60/40
        Protected Bevel:-----------------------------------<0.25mmx45deg
        Coating:---------------------------------------------uncoated, AR, HR, PR Coating, etc.

        N-BK7 Plano Concave Lens

        Design wavelength: 546.1nm Design Index:1.5183 ± 0.0005

        Part No.
        f (mm)
        dia (mm)
        R1 (mm)
        tc (mm)
        te (mm)
        fb (mm)
        Illustration
        PCV1201
        -15.0
        12.7
        7.78
        2.0
        5.3
        -16.3
         
        PCV1202
        -20.0
        12.7
        10.37
        2.0
        4.1
        -21.3
        PCV1203
        -25.0
        12.7
        12.96
        2.0
        3.7
        -26.3
        PCV1204
        -30.0
        12.7
        15.55
        2.0
        3.4
        -31.3
        PCV1205
        -40.0
        12.7
        20.73
        2.0
        3.0
        -41.3
        PCV1206
        -50.0
        12.7
        25.92
        2.0
        2.8
        -51.3
        PCV1301
        -25.0
        25.4
        12.97
        2.0
        10.9
        -26.3
        PCV1302
        -35.0
        25.4
        18.14
        2.0
        7.2
        -36.3
        PCV1303
        -50.0
        25.4
        25.92
        2.0
        5.3
        -51.3
        PCV1305
        -75.0
        25.4
        38.87
        2.0
        4.1
        -76.3
        PCV1306
        -100.0
        25.4
        51.83
        2.0
        3.6
        -101.3
        PCV1307
        -150.0
        25.4
        77.75
        2.0
        3.0
        -151.3
        PCV1308
        -200.0
        25.4
        103.66
        2.0
        2.7
        -201.3

        Plano Concave Lens - Fused Silica

        Design wavelength: 546.1nm Design Index:1.46008

        Part No.
        F(mm)
        f(mm)
        R(mm)
        Tc
        Te
        Fb
        Illustration
        PCV2101
        12.7
        -15.0
        6.92
        2.0
        6.17
        -16.41
        PCV2102
        12.7
        -20.0
        9.20
        2.0
        4.54
        -21.38
        PCV2103
        12.7
        -25.0
        11.51
        2.0
        3.91
        -26.38
        PCV2104
        12.7
        -30.0
        13.80
        2.0
        3.55
        -31.37
        PCV2105
        12.7
        -40.0
        18.41
        2.0
        3.13
        -41.38
        PCV2201
        25.4
        -35.0
        16.11
        2.0
        8.20
        -36.36
        PCV2202
        25.4
        -50.0
        23.01
        2.0
        5.82
        -51.38
        PCV2203
        25.4
        -75.0
        34.51
        2.0
        4.42
        -76.38
        PCV2204
        25.4
        -100.0
        46.03
        2.0
        3.79
        -101.42
        PCV2205
        25.4
        -150.0
        69.02
        2.0
        3.18
        -151.39
        PCV2206
        25.4
        -175.0
        80.54
        2.0
        3.01
        -176.43
        PCV2207
        25.4
        -200.0
        92.04
        2.0
        2.88
        -201.42
        PCV2208
        25.4
        -250.0
        115.08
        2.0
        2.70
        -251.50
        PCV2209
        25.4
        -300.0
        138.04
        2.0
        2.59
        -301.41
        PCV2210
        25.4
        -500.0
        230.10
        2.0
        2.35
        -501.50
        PCV2211
        25.4
        -1000.0
        460.10
        2.0
        2.18
        -1001.42
        PCV2401
        38.0
        -50.0
        23.01
        3.0
        13.03
        -52.07
        PCV2402
        38.0
        -100.0
        46.03
        3.0
        7.10
        -102.10
        PCV2403
        38.0
        -150.0
        69.02
        3.0
        5.67
        -152.07
        PCV2404
        38.0
        -200.0
        92.04
        3.0
        4.98
        -202.11
        PCV2405
        38.0
        -350.0
        161.06
        3.0
        4.13
        -352.13
        PCV2406
        38.0
        -500.0
        230.10
        3.0
        3.79
        -502.19

         

        Note: Other sizes, material are available upon request.
        The ones with Silicon, Ge,CaF2 material pls kindly refer to IR OPTICS section.


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